The d25123k 26mm heavy duty sds plus combination hammer is ideal for drilling anchor and fixing holes into concrete and masonry from 4 to 26mm in diameter and has electronic variable speed for total control in any application it has an impact stop setting for drilling in wood steel ceramic and screwdriving applications and a rotation stop setting for light chiselling applications in brick soft masonry and occasionally concrete the safety clutch eliminates sudden high torque reaction should the b